Hand-wrench



UNITED sTATEs PATENT OFFICE.

G. B. PHILLIPS, OF ALBANY, NEW YORK.

HAND-WRENCH.

Specification of Letters Patent No. 17,844, dated July 21, 1857.

To all whom 'it may concern:

Be it known that I, GEORGE B. PHILLIPS, of the city of Albany, State of New York, have invented a new Method of Constructing Hand-Wrenches and I declare the following specification, with the drawings hereto appended as, part of the same, to be a full and perfect description thereof.

Figure 1 represents the complete instrument. Fig. 2 re resents the section vertically through t e center of the wrench. Fig. 3 represents the jaws with their operating apparatus withcut the external case.

Similar letters in the different figures denote the same parts of the apparatus.

A is the case inclosing the jaws and forming the handle of the wrench. It is secured by rivetin or otherwise, firmly to the lower edge, of t e lower or fixed jaw, and forms substantially a part of it. As it incloses the upper-jaw closely for a great part of its length, in whatever position the jaw may be it is manifest that no strain upon the wrench can break it unless it be sufficient to tear the casing apart forming a resistance to stress u on the jaws not to be found in any wrenc es now made of the same weight and working size.

B is the upper jaw. C the lower jaw. In Fig. 2 they are shown as closed together. In Fig. 3 as slightly opened. The apparatus by which they can be opened and shut, and the extent of their opening be regulated teeth to match the teeth of the upper jaw,v

and which when down in place can lie wholly without the range of the teeth of the u per jaw as shown at B, Fig. 2. These bibcks are kept in Contact with the upper jaw by two springs G, G, acting upon stems passing through the lower jaw under the blocks. The blocks are so fitted that when one is meshing into the teeth of the upper j aw as E, Fig. 3, the teeth of the other blocks are directly opposite those of the upper jaw as D, Fig. 3.

To bring both the blocks down in their sockets and thus permit the upper jaw to glide back and forth, there is a sort of saddle II, Fig. 2, consisting of two straps of metal coming down on each side of the u er jaw and resting upon pins d, d, in t e locks. They are attached at top to a thumb piece K by pressing upon which the blocks are held down till the jaws are adjusted to their place.

From the positiony of the teeth of the blocks in reference to those of the upper jaw it will be seen that the jaws can be regulated to a distance equal to half the s ace between two teeth, for if block E e withdrawn and the up er jaw be moved a half space either way t e teeth of D will mesh into those of the jaw. A pocket wrench of. the size shown in the drawings can be made that will work at differences of gli of an inch.

I claim- In combination with the jaws the arrangement described for regulating the space between the jaws, and securing them when so adjusted that is to say: by the employment of the toothed blocks operated alternately upon teeth in the upper jaw, by the spring and saddle or their equivalents so .as to regulate the space, to distances differing by half the space between the teeth substantially as set forth in the specification.

. G. B. PHILLIPS.

Witnesses:

RICHD. VAN DE WITT, JAMES B. SANDERS. 

